TY - JOUR
T1 - Influence of deception of task duration on the sex-specific physiological responses to RPE-clamp cycle ergometry
AU - Succi, Pasquale J
AU - Benitez, Brian
AU - Kwak, Minyoung
AU - Mitchinson, Clara J
AU - Butterfield, Timothy A
AU - Samaan, Michael A
AU - Clasey, Jody L
AU - Bergstrom, Haley C
N1 - © 2025. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2025/1/7
Y1 - 2025/1/7
N2 - PURPOSE: The purpose of this study was to examine the sex-specific influence of expected exercise duration on the physiological responses to RPE-clamp exercise anchored to RPE 15 with participants being deceived into believing the RPE-clamp exercise would last for 20-, 30-, or 40-min, but all trials were 30-min.METHODS: Twelve males and 12 females completed a graded exercise test followed by randomly ordered RPE-clamp trials at RPE15 on the Borg 6-20 scale where subjects were deceived into expecting exercise to last for either 20-, 30-, or 40-min, but the actual duration for each trial was 30-min. Separate 2 (Sex [Male vs. Female]) × 3 (Deception [20-min, 30-min, 40-min]) × 11 (Time [0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30 min]) mixed model analyses of variance (ANOVAs) with appropriate follow-up ANOVAs, and Bonferroni-corrected pairwise comparisons, were used to examine changes in volume of oxygen uptake (
V
˙
O
2
), heart rate (HR), respiration rate (RR), power output, and muscle oxygen saturation (%SmO
2).
RESULTS: Females, but not males, demonstrated lower power outputs when expected duration was 40-min compared to 20-min after approximately half of the exercise bout.
V
˙
O
2
, regardless of Sex, was also lower when expected duration was 40-min (62.47 ± 5.59%
V
˙
O
2
max
) compared to 20-min (66.35 ± 5.79%
V
˙
O
2
max
). There was no effect of expected duration on HR, RR, or %SmO
2, but females demonstrated significantly higher HR (86.06 ± 5.93%HR
max) and RR (74.81 ± 7.26%RR
max) compared to males (79.52 ± 4.96%HR
max; 62.31 ± 5.80%RR
max).
CONCLUSIONS: RPE-clamp exercise performance in females, but not males, may be influenced by the expectation of exercise duration.
AB - PURPOSE: The purpose of this study was to examine the sex-specific influence of expected exercise duration on the physiological responses to RPE-clamp exercise anchored to RPE 15 with participants being deceived into believing the RPE-clamp exercise would last for 20-, 30-, or 40-min, but all trials were 30-min.METHODS: Twelve males and 12 females completed a graded exercise test followed by randomly ordered RPE-clamp trials at RPE15 on the Borg 6-20 scale where subjects were deceived into expecting exercise to last for either 20-, 30-, or 40-min, but the actual duration for each trial was 30-min. Separate 2 (Sex [Male vs. Female]) × 3 (Deception [20-min, 30-min, 40-min]) × 11 (Time [0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30 min]) mixed model analyses of variance (ANOVAs) with appropriate follow-up ANOVAs, and Bonferroni-corrected pairwise comparisons, were used to examine changes in volume of oxygen uptake (
V
˙
O
2
), heart rate (HR), respiration rate (RR), power output, and muscle oxygen saturation (%SmO
2).
RESULTS: Females, but not males, demonstrated lower power outputs when expected duration was 40-min compared to 20-min after approximately half of the exercise bout.
V
˙
O
2
, regardless of Sex, was also lower when expected duration was 40-min (62.47 ± 5.59%
V
˙
O
2
max
) compared to 20-min (66.35 ± 5.79%
V
˙
O
2
max
). There was no effect of expected duration on HR, RR, or %SmO
2, but females demonstrated significantly higher HR (86.06 ± 5.93%HR
max) and RR (74.81 ± 7.26%RR
max) compared to males (79.52 ± 4.96%HR
max; 62.31 ± 5.80%RR
max).
CONCLUSIONS: RPE-clamp exercise performance in females, but not males, may be influenced by the expectation of exercise duration.
U2 - 10.1007/s00421-024-05698-7
DO - 10.1007/s00421-024-05698-7
M3 - Article
C2 - 39762439
SN - 1439-6319
JO - European Journal of Applied Physiology
JF - European Journal of Applied Physiology
ER -